We look at the division of 31545560 by 75 
The aim is to understand the frequency of 75 in 31545560.

On to step 1:
3 divided by 75 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 75

On to step 2:
If we divide 31 by 75, we get 0 and a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Bring next digit (5) of the dividend behind the 31 and repeat the process: 315 / 75

Moving on to step 3:
75 goes into 315 4 times with a remainder of 15.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 300 from 315, we get 15.
Take the next digit (4) from the dividend and append it to 15, then repeat: 154 / 75

Going ahead to step 4:
154 divided by 75 is 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
If we take 150 away from 154, we end up with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 75

Advancing to step 5:
If we divide 45 by 75, we get 0 and a remainder of 45.
Put 0 as the next digit of the answer. 
Result so far: 420.0
If we subtract 0 from 45, we get 45.
Fetch the next digit (5) from the dividend, attach it to 45 and continue: 455 / 75

On to step 6:
455 divided by 75 is 6 with a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 4206.0
Subtracting 450 from 455 leaves us with 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 75

Let's proceed to step 7:
56 divided by 75 is 0 with a remainder of 56.
The next digit of our result is 0. 
Result so far: 42060.0
If we take 0 away from 56, we end up with 56.
Append the next digit (0) from the dividend to 56 and continue with: 560 / 75

Let's proceed to step 8:
75 goes into 560 7 times with a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 420607.0
If we subtract 525 from 560, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 9:
When dividing 350 by 75, we get 4 with a remainder of 50.
Write down 4 as next digit of the result. 
Result so far: 420607.4
If we subtract 300 from 350, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 10:
When dividing 500 by 75, we get 6 with a remainder of 50.
Put 6 as the next digit of the answer. 
Result so far: 420607.46
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 11:
75 goes into 500 6 times with a remainder of 50.
The number 6 becomes the next digit in our result. 
Result so far: 420607.466
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 420607.466 and a remainder of 0.005.